Now, I've watched this series enough to be really familiar with it, but there's still two things I don't get about Evil Buu/Super Buu/Kid Buu
1.) When Evil Buu eats Majin Buu, it's like he absorbed him and he transforms into Super Buu. Then, Super Buu absorbs Gotenks, Piccolo, and Gohan and transforms. When Goku and Vegeta remove Goten, Trunks, Piccolo, and Gohan from inside Buu's head, he turns back into the original Super Buu. But when Majin Buu is removed from him, he turns into Kid Buu. Why didn't he turn back into Evil Buu?
I understand Kid Buu is Majin Buu without the influence of Dai Kaio inside him, but Evil Buu is Majin Buu's evil half without Majin Buu, so why did he turn back into the original Majin Buu's original form instead of his own original form?
2.) Majin Buu and Evil Buu, who eventually becomes Kid Buu as mentioned above, are two halves of the same demon. So, Goku destroys Kid Buu with a Spirit Bomb, and Majin Buu lives on. But when Nappa killed Piccolo, Kami died as well, as they are two halves of the same Namek. Likewise, when Kami was almost killed by former guardians, Piccolo was beginning to fade away. Why didn't the same thing happen with Majin Buu when Kid Buu was killed?
As far as we know, the link between two life forms only applies to Namekians and the Supreme Kai and God of Destruction, as for why he transformed into Kid Buu and not back into Evil Buu is because when Evil Buu and Good Buu, have the same memories, demonstrated when Super Buu remembers Hercule, but when they removed Fat Buu from Evil Buu, it removed all the memories so he forgot all about the kindness Hercule showed him and became the ruthless killing machine known as Kid Buu. I'm pretty sure that's why but I might be wrong
And wait. I once read Ward Perry was the Ocean voice of Kid Buu, and Dodoria, but the current information is that he's neither of them, Kid Buu is Brian Dobson (just like Evil Buu and Super Buu) and Dodoria is Paul Dobson (just like Zarbon)?
Best guess is when he ate Fat Buu. He put all the Kai essence inside him in his head and not in his body making Evil Buu's body pure majin while Fat Buu kept the kai's influence. Why else didn't you see the Grand Supreme Kai in Supr Buu's head when Goku and Vegeta were in there?
Also when Good Buu expelled Evil Buu from his system. It was just all the evilness in Good Buu's body that became the evil form. And not only that but when kid buu was killed, he got reincarnated into Uub on earth by King Yemma. So the life connection could still be there between Good Buu and Uub.
Good Buu kept the Kais in his body While Evil Buu did not in his. But Evil Buu is using a template of Good Buu as his body with some altercations and took the bulk of his power, but not all of it.
So when he ate Good Buu. Good Buu's body acts as a shield to prevent the Kai's influence from reaching all over Super Buu's body. It's like this: Inside Super Buu's head is Good Buu, in a pod. and inside Good Buu's head in the pod is another pod containing Grand Surpreme Kai.
So when Vegeta ripped out Fat Buu. Super Buu's body was pure majin type with an altercation to his size because of the Good Buu pod and he didn't revert to Evil Buu because everything that made Evil Buu apart from his evilness was pushed into Good Buu and kept Super Buu pure. And that revert his mind to the pure type majin which is Kid Buu as well as regressing his body.